Help back fires under boost

[molotovman]

when i get into boost it starts backfiring, i was told that it had something to do with my BOV and recirculator, i was also told that i might need a mass air flow conversion? can someone explain this to me, I am a turbo newb so i have no idea what they are talking about

 

[nytescion]

your car idles rough because your bov isn't recirc'd. when your turbo is in vacuum (idle or not under load) your bov is forced open, not a lot but it is open. the air coming into the motor is seen at the intake but disappears before it gets to the intake manifold because your bov is releasing it into the atmosphere and not back into the system. your motor is doing this all the time wondering where all its air is going... its a $25 piece thats needed when running any kind of bov on a DSM. heres a picture of mine recirced and what it should look like...

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ignore the white powder, my car caught on fire and co2 makes a big mess.

now for the 5500rpm bov stutter/backfire. its hard to tell whats happening under boost inside your motor unless you get some kind of logger. since you don't have a fuel management system OR a logger id suggest saving for dsmlink, it does both for you and the install is plug and play once you get a eprom ecu. since your running 8lbs of boost at 5500rpm im going to say that your running rich. theres to much fuel in the motor and not enough air being pushed in by the turbo, id turn the boost up to at least 12lbs since that what your car runs in stock form to see if it corrects the problem... if not just don't get into the throttle until you get the supporting mods for your bigger turbo and get it on a dyno to get tuned. its still driveable once you get a recirc pipe on your bov, just not raceable...

and get a battery tie down while your at it, thats why my car caught on fire. the battery shorted to my strut tower brace on christmas eve. that was the DSM gods telling me i was being an idiot so don't make the same mistake...

Wow.....don't turn up the boost. Check all the other stuff people and I have said already and let us know what you find.